My Tech Blog (대여기록이존재하는)

📑 1. 문제설명❌ 2. 실패한 시도코드는 작동하지만 정답 처리 X이유: CAR_ID 중복됨SELECT A.Car_idFROM Car_rental_company_car A JOIN Car_rental_company_rental_history B ON A.Car_id = B.Car_idWHERE A.Car_type = '세단' AND B.Start_date BETWEEN '2022-10-01' AND '2022-10-31'ORDER BY A.Car_id DESC;⭐ 3. 정답코드CAR_ID 중복이 없어야 하며 -> DISTINCT대여 기록이 있는 -> ON A.CAR_ID = B.CAR_IDSELECT DISTINCT(A.Car_id)FROM ..